These riots seem to me to be very stupid. The brother of the killed man has said he is unhappy with them so what are they achieving by doing this other than destroying things? It would have been far better if they had protested (if that's the right term) by having a sponsored sit in outside the police station, with enough sponsors they could have raised quite a lot of money, this money could then have been given to the grieving family in order to give them a small consolation for their loss.
Riots will rarely achieve anything and honestly seem just to be an excuse for violence or looting...